diff options
Diffstat (limited to 'lib/ssl/src/tls_record.erl')
| -rw-r--r-- | lib/ssl/src/tls_record.erl | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/lib/ssl/src/tls_record.erl b/lib/ssl/src/tls_record.erl index afbf95948d..20598ea702 100644 --- a/lib/ssl/src/tls_record.erl +++ b/lib/ssl/src/tls_record.erl @@ -495,11 +495,19 @@ binary_from_front(SplitSize, {Front,Size,Rear}) when SplitSize =< Size -> binary_from_front(SplitSize, Front, Size, Rear, []). %% %% SplitSize > 0 and there is at least SplitSize bytes buffered in Front and Rear -binary_from_front(SplitSize, [], Size, [_] = Rear, Acc) -> - %% Optimize a simple case - avoid lists:reverse/1 - binary_from_front(SplitSize, Rear, Size, [], Acc); -binary_from_front(SplitSize, [], Size, [_|_] = Rear, Acc) -> - binary_from_front(SplitSize, lists:reverse(Rear), Size, [], Acc); +binary_from_front(SplitSize, [], Size, Rear, Acc) -> + case Rear of + %% Avoid lists:reverse/1 for simple cases. + %% Case clause for [] to avoid infinite loop. + [_] -> + binary_from_front(SplitSize, Rear, Size, [], Acc); + [Bin2,Bin1] -> + binary_from_front(SplitSize, [Bin1,Bin2], Size, [], Acc); + [Bin3,Bin2,Bin1] -> + binary_from_front(SplitSize, [Bin1,Bin2,Bin3], Size, [], Acc); + [_,_,_|_] -> + binary_from_front(SplitSize, lists:reverse(Rear), Size, [], Acc) + end; binary_from_front(SplitSize, [Bin|Front], Size, Rear, []) -> %% Optimize the frequent case when the accumulator is empty BinSize = byte_size(Bin), |